Incinerator.



1 to receive the ashes UNITED STATES PATENT OFFICE.

:sax nnnsnrn; or rninr nrvnn FALLS, mnnvnso'm. f

INCINEBATOB.

' Speclcation of Letters IPatent.

VPatented'N017'. e, 1917.

Applica-tion filed March 8, 191,6. Serial No. 82,930.

To all whom 'it may concern.'

f Be it known that I, IsAK Hnnsm'n, a citizen of the United States, residing at Thief River Falls, in the `county of Pennington and State of Minnesota, have invented'fa new and useful Improvement in Incinerators, of whichthe following isa specificaing a furnace having improved means forV maintainin combustion, so as to secure rapid and for supporting such material in eilicient position upon the grate and withinpthe com# bustion chamber.

A still further' object to provide improvedv means for feeding the material and supplying airto the grate for the purpose of `most electively burnin the massand promotingV combustion to aiigh degree.

To these ends my` invention comprises the features of construction and combination,

and arrangements of parts hereinafter more fully described .and claimed.

In the accompanying. drawings forming part of this specification, Figure 1 is a longitudinal section' Fig. 2 is a section take'aii 'on the line X-k of Fig. 1' Fig. 3 is a section taken on the line Y`-,Y. of Fig. 1'- Fig. 4 is a section-taken on theline Z-Z of Fig. 1; Fig. 5 is a section of a detail; Fig. 6 is a perspective of one' of the grate bars and Fig. 7 is a `sideelevation of a detail of one of the grate bars.

In carryin my invention into practice, rovide,I a rnace A, the body walls 2 of w ich are constructed of brick or other suit able material resting upon a concrete foundation 3. The furnace is provided with a fire lace or box 4, an. ash pit and combustion chamber 6', said .ash pit being so constructed that a truck B may be employed ,and remove them. .The fire box and ash pit have at the front of the furnace, doors 7 andI 8 respectively for .sists of a metallic projecting4 ree burning of the material and.

of the invention is the combustionV against any tendency i of vsubstantially the supply of fuel and the removal ofthe ltruck. *Within the bottom of the fire box i'sarranged va grate to support the body of fuel employed, which grate preferably conl frame work 10 carrying frocking grate bar sections 11 and 12. These "gra-te b ar sections lhave rods or shafts 1 3` through the furnace wall which are adapted. torbe engaged by Va .lever .0r other'means for transmitting rocking motion to the grate 'sections to dump the ashes,

etc. i

Formedin the furnace Wall around the i grate is an air feed duct comprising a pair 'of parallel channels 15 and 16 located on opposite sides of the fire box and connected at the rear by a cross channel 17, (see Fig. 4), which channels surround the fire box Von'three sides and communicate through ports 14 in line with and above and below the grate, whereby a course of circulation for the' supply of air in the fire box around, above and below,the grate is provided to support combustion to a hi hly eilicent degree, the air being p'rehea during its passage by the hot walls of the furnace, so as to oxygenate the burning mass of fuel to thehighest possible deee.

The fire box and com ustion chamber are provided' with an interior lining of lire brick or the like and the fire box communicates at itsupper ortion with the base of the combustion chain r. As show-n the basev of chamber is provided at two of its opposite sides with downwardly converging sloping walls 20, which are preferably stepped and which overhang and contract the top" of the fire box forming an oblong rectangular passage 21 to permit the -bed of fuel on the grate to the combustion chamber, while at the same time holdin the body of garbage or` refuse materi supported to smother the flames or choke the llame outlet. By this means the body of fuel will be protected and pro vision made, forinsuring the incineration of the.garbage or material above in a rapi manner. Adraftdoor 22 of suitable construction may be provided for controlling the end of eachoffthe air flues 15 andl.

The body of the combustion chamberis uniform diameter an e'xtends up. to a predetermined heightl The flames from the pass upward into 'upper end of the combustion chamber is formed with a cone shaped dome 23 terminating at its upper extremity in an outlet '24 for smoke and gases and leadin through an arched flue 25 to a smoke stac 26. At one side of the upper part of the combustion chamber is an outwardly swinging door 27 through which the refuse, garbage or any material to be incinerated is placed in the furnace. When the door is tipped back it acts as a chute from the platform 28, so that material can be unloaded readily from wagons or receptacles and uided into the furnace. The top' walls or ning of the furnace may be made out of any suitable fire resisting material. The rail or beam truck 29 disposed above the platform 28 facilitates the handling and discharging of heavy material above the platform 28 and into the fur-nace.

Communicating with the upper part of the combustion chamber through a lateral passage 30 is a receiving or drying chamber 31. This chamber is provided at one side with a door 32 through which wet garbage or material to be .incinerated is introduced by any suitable means. This material on its introduction into the drying chamber deposits on a drying table B extending from lthe back of the drying chamber downwardly .at an angle into the upper portionof the combustion chamber of the furnace, thus forming an inclined' drying plane, whereby the material is delivered to the combustion chamber through the arched opening 30. The drying table consists of a rectangular skeleton frame 33 having four racks 34 substantially equally distributed apart, said racks riding upon four geared sectors 35. These sectors are mounted upon a pair of laterally dis osed shafts 36 and 37, which are journale in bearings 38, said bearings being supported by the side walls 39 and 40 yof the drying chamber. Rocking motion is imparted to one of the shafts 36 by any suitable drive mechanism, such as C, and as a result longitudinal reciprocating motion is imparted to the drying table B. Mounted upon the frame 33 are a plurality of grate bars or sections 41, which are formed with longitudinal depending ribs 42, said ribs being removably seated in grooves 43 in' the sides of the frame 33 whereby the grate bars can be removed from time to time for cleaning or replacin The upper surfaces of the grate bars 41 ie in a substantially single plane, and immediately above the surfaces of said grate bars are disposed a plurality of transverse Slicer bars 44, the ends of which are seated in the opposite walls 39 and 40. These slicer bars taper toward their upper receiving edges and terminate at their lower delivery edges in abrupt shoulders 45. As the drying table is moved backward and forward the cutting edges of the Slicer bars loosen the material which is supported upon the rate bars, and .guilde the same downwar toward and into the combustion chamber 6 and the shoulders 45 catch and hold the advancing material against return movement during the upward stroke of the dry ing table. As a result the reciprocating dry ing table feeds the material, which is being dried and consumed on the grate bars, step by step downwardly into the combustion chamber 6. The reciprocating motion imparted to the shaft 36 may be produced by an electric motor 47 or other prime mover and suitable mechanism connected with said motor and with said shaft for converting revolving motion into reciprocating motion and reducing speed during the transmission of the power such as illustrated. Leading from the drying chamber is an air duct or channel 48 through which the hot air and gases from the furnace may escape to the ue 49 and to the stack after assing over or beneath the wet refuse and) garbage. A damper 50 running in the channels 51 serves to regulate the size of the opening in the duct 48, through which the heated air and gases may pass. It will of course be Vunderstood that the combustion chamber may be charged at intervals with substantially dry material to be burned, and that while one charge is being burned in the combustion chamber another or succeeding charge may be dried upon the drying table so that when fed to the combustion chamber it may be burned more quickly and with less expenditure of fuel than would be possible if the moist material were fed directly into the combustion chamber. The Walls of the drying chamber may have their inner surfaces constructed of any suitable high heat resisting material. The burner or incinerator may be made of any size and working capacity that may be desired for rivate, town or city use and may be employefor incinerating garbage and refuse of all kinds.

From the foregoing description, it will be understood that the invention provides an apparatus of its general character, which is sim le and inexpensive in construction, and e cient in use. It is also adapted to be easily and conveniently handled. While the grate to the furnace proper is shown constructed for 'burning solid fuels, it will'be understood that oil or other fuels may be employed when found desirable.

In accordance with the patent statutes, I have described the principles of operation of my invention, together with the ap aratus which I now consider to represent t e best embodiment thereof, but I desire to have i1 understood that the construction shown is only illustrative and that the invention car be carried out by other means and applied t( uses other than those above set forth withr the sco of the following claims.

Having described my invention, what l reception of refuse,

:smaniav claim as new and desire to protect by Letters Patent is; i

1. Apparatus of the class set forth, comprising, 1n combination, an incinerating furnace having a combustion chamber for the a chimney with which said chamber is connected, a preheater having a drying chamber connected with said combustion chamber and leading into said chimney and into which the wet refuse may be placed, a drying table upon which the wet refuse is deposited in said drying chamber and inclined downwardly toward said combustion chamber, said table being arranged in the path of draft passing below andabove said table from said combustion chamber; said table comprising a frame, a plurality of 4grate bars carried by said frame, and oscillating means mountedin said drying chamber by which said frame is reciprocated to assist 1n feeding the refuse into said combustion chamber, means for driving said oscillating means, and a plurality of transverse Slicer bars fixed in said drying chamber and coperating with said grate bars to assist in feeding the refuse into the combustion chamber.

2. A garbage furnace comprising a combustion chamber having a smoke and gas outlet and a feed opening for dry refuse, a drying chamber having a feed opening for wet refuse and communicating with said combustion chamber, a shaker table downwardly inclined toward the,communication between said combustion chamber 'and said drying chamber and disposed within said drying chamber for assisting in deliver' refuse intothe combustion-chamber, spalcle slicer bars arranged above said table for cleaning the same, each of said bars having a, reduced receivin edge and an enlarged delivery edge forming a disintegrating and a stop sur ace for refuse and means for reciprocating said table within said drying tion chamber, and

chamber, said slicer bars and table by their conjoint action advancing the refuse into said combustion chamber.

3. A garba e furnace comprising a combustion cham r, a drying chamber associated with and opening -into said combustion chamber, a shaker ltable disposed for reciprocating movement within said drying chamber to assist in delivering into -said combustion chamber having a plurality of spaced grate sections removably mounted thereon with their'upper surfaces lying in a substantially single plane, a series of Slicer bars mounted above the upper faces of said sections transversely of said table, for advancing refuse over said sections toward said combustion chamber, said slicer bars tapering toward their upper receiving edges and terminating at their lower delivery edges in abrupt shoulders, and means for imparting a recxprocatin movement to said frame, whereby the con]oint action of said frame and sections will deliver refuse into said combustion chamber.

4. A garbage furnace comprising a combustion chamber, a drying chamber associated with and opening into said combustion chamber, a pair o spaced shafts laterally disposed across said drying chamber,

eared sectors mounted on said shafts, a rame having' racks meshing with said sectors and arranged with one o f its ends adjacent said combustion chamber, grate sec tions carried by said frame, means immovably mounted above the upper faces of said sections for assisting in disintegrating and advancing said refuse toward the combusmeans for imparting rocking movement to said shafts and a reciprocating motion to the parts carried thereby.

In testimony whereof, I have signed my name to this specification.

ISAK HELSETH. 

